Coffee-making apparatus



Nov. 19, 1929. E. PISTON] ET' AL I 1,735,450

COFFEE MAKING APPARATUS Filed July 20, 1928 /n Ven tors away- 4,

Patented Nov. 19, 1929 UNITED STATES ENBICO PISTONI AND LORENZO PISTONI,OF MILAN, ITALY COFFEE-MAKING APPARATUS Application filed July 20,1928', Serial No. 294,186, and in Italy J'u1y 29, 1927.

This invention relates to a coffee-making apparatus and consists in theprovision of a vessel having lateral outlet and inlet ports andcontaining a slidable, open-ended cylinder adapted in its upperpositions to act as a closure for said ports, the cylinder being fittedwith a strainer adapted to receive coffee powder from a mill in thelower posit-ion of the cylinder and with a coffee receptacle ,10 adaptedto communicate with a delivery spout on the vessel in the upper positionof the cylinder, water for the making of the coffee being admitted intovessel from the top thereof. The coffee powder is fed into the vessel bymeans of an air current, and means are provided for effectively clearingthe vessel and coffee receptacle from grouts.

Fig. 1 of the accompanying drawings represents a vertical section of thedevice, and

Fig. 2, a cross-section on the line 2-'-2 of Fig. 1.

The apparatus is composed of a bell-shaped cylindrical vessel 1 withinwhich an openended cylinder 5 is arranged to slide. The cylinder fitsthe vessel snugly so that it will act as a closure for a plurality ofinlet and outlet ports with which the median and upper portions of thevessel are provided. For

moving the cylinder up and down in the vessel, 2. pivoted hand lever 22is provided which moves, by means of a toothed sector 23,- a rack 19,the latter being held in a guide 21 and pivoted at 20 to the cylinder.The upper end of the cylinder 5 is covered with a strainer 4 under whichthere is a coffee receptacle 6. The latter has an inclined dischargepipe 7 which opens at 8 through the cylinder wall and which can be setin communication with a deliver spout 24 connected to the vessel 1. A coee mill 12 is provided which discharges the powder at 13 into aninclined pipe 14 openin through a port 15 into the vessel. An e eetricmotor 32 drives a coffee mill and 'also,;a fan 16 which receives airfrom the vessel lxthrough a port 18 and a pipe 17. Apertures 33 areprovided in the powder conduit for the admission of air. A ho per 10,which receives the cotfee beans or the mill, is fitted with a pluralityof shutters 11 arranged at different elevations so as to allow thecoffee to be ap-. portioned according to requirements.

' Surrounding a plurality of ports 25 in the vessel is a gutter 28provided with an outlet 29 for the grouts. Another port 31, whichcommunicates with a discharge pipe 30', is arranged so as to communicatealso with the discharge pipe 7 of the coffee receptacle when thestrainer 4 is situated immediv ately below the ports 25. A ring 34 which00 can be rotated by means of a handle and which has apertures adaptedto register with the ports 25, can be used for closing the latter fromthe outside.

Hot water and steam can be admitted into 05 the vessel through the domedcrown 2 from a pipe 3, and another pipe 27 supplies cold water, athree-Way cook 26 being provided for the selection of one or the other.

- The action is as follows:

With the different elements in the position shown by full lines in Fig.1, the cofiee mill 12 and the fan 16 are set in motion, the requireduantity of coffee beans having previously een measured off by means ofone of the shutters 11 and fed into the mill. The fan draws air from thevessel and fresh air is drawn in through the pipe 14 from the apertures33, the ports 25 being closed by the ring 34. The coffee powder iscarried along by the air current and settles in an even layer on thestrainer 4. After the grinding of the coffee, the cylinder 5 is raisedby means of a hand lever 22 so as to bring the strainer into theposition 4. and the discharge pipe 7 into communication with the spout24. The cook 26 is then opened for admitting hot water and steam fromthe pipe 3 into the upper part of the vessel. The water percolatesthrough the coffee layer and 00 through the strainer '4, and the brewedcoffee flows from the receptacle 6 through the pipe 7 and spout 24 andis delivered y the latter.

In order to clear away the grouts after the brewing operation, thecylinder is lowered so as to place the strainer in the position 4"immediately beneath the ports25 which are set ffee by a correspondingadjustment" of the ring 34. Cold water is then admitted from 1 00 thepipe 27 so asto wash the grouts oil the strainer through the ports 25into the gutter 28 whence the are discharged. Waterpassing through t estrainer into the receptacle 6 cleans the latter and is dischargedthrough the pipe 30.

constructional details of the aipparatus mliy be varied within the scopeof t einvention. Y a

We claim:

1. A. cofl'ee'inaking apparatus comprising a cylindrical vessel havinlateral inlet and outlet ports, an open-en ed cylinder fitted slidablyand snugly in said vessel so as to act in its upper positions as aclosure for the ports, means for shifting the cylinder up and down inthe vessel a strainer covering the upper end of the cylinder, a coffeemill communicating with the vessel'through one of said ports so as todeliver the coflee powder on to said' strainer when the cylinder is inthe lower end. position, a coffee receptacle arranged in the cylinderunder the strainer, a delivery spout connected to the vessel over one oftheports, a discharge pipe for the eofi'ee receptacle opening at theside of the cylinder so as to be in communication with said out in theupper end position of the cylin er, and means or admitting water throughthe top of the Vessel. i 2. The structure claimed in claim 1 incombination with a fan communicating with the vessel through one of theports, and means for operatin said fan in conjunction with the coflee mi1 so as to draw air through the coflee powder conduit into the vessel.

3. The structure claimed in claim 1 in combinationwith a guttersurrounding the vessel opposite a circumferential row of outlet portsand a discharge pipe connected to the vesse over another out et port soas to be in communication with the discharge pi of the coffee receptaclewhen the strainer 1s situated immediatel underneath said circumferentialrow of out et ports, substantially as and for the purpose set forth.

4. The structure claimed in claim 1 in combination with a hopper forfeeding coffee beans to the mill, and shutters arran ed in differentelevations in said ho per or app.or-'

tioning the cofiee to the m1 ENRICO PISTONI. LORENZO PISTONI.

